A precision compensation device for sheet metal bending angle

Abstract

The utility model discloses a kind of precision compensation devices of sheet metal bending angle, including upper locating block and lower supporting block, upper locating block is used to move down and compress sheet metal part on lower supporting block, and upper locating block side surface is equipped with liftable pressure block;At least one angle compensation mechanism is provided on pressure block;The position of angle compensation mechanism corresponds to the bending part formed after sheet metal part is pressed down by pressure block;Angle compensation mechanism is used to bend bending part transversely after pressure block presses down and forms bending part, to compensate the expected rebound of the bending part, so that it reaches predetermined bending angle.The utility model is bent to compensate rebound amount by angle compensation mechanism to bending part secondary, realizes sheet metal bending angle accurate control.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal bending technology, and in particular relates to a precision compensation device for sheet metal bending angle. Background Technology

[0002] In sheet metal bending processes, springback due to elastic recovery after material unloading is a long-standing technical challenge. Springback causes the actual bending angle of parts to deviate from the design value, severely affecting product assembly accuracy. Traditional solutions rely on manual experience, such as using shims for compensation or repeated trial molding for correction, which is inefficient and inconsistent. Some equipment attempts to suppress springback by over-bending, but this easily causes surface damage or excessive deformation of the material. Existing bending devices lack active compensation for springback, making it difficult to accurately control the forming angle in a single processing cycle. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a precision compensation device for sheet metal bending angle. By using an angle compensation mechanism to compensate for the springback of the bending part during secondary bending, the sheet metal bending angle can be precisely controlled.

[0004] Technical solution: To achieve the above objectives, this utility model provides a sheet metal bending angle precision compensation device, which includes an upper positioning block and a lower support block. The upper positioning block is used to move down and press the sheet metal part on the lower support block. The upper positioning block is provided with a liftable pressure block on its side.

[0005] At least one angle compensation mechanism is provided on the pressure block; the position of the angle compensation mechanism corresponds to the bending portion formed after the sheet metal part is pressed down by the pressure block.

[0006] The angle compensation mechanism is used to laterally push the bent portion to perform a secondary bend after the pressure block is pressed down to form the bent portion, so as to compensate for the expected springback of the bent portion and make it reach the predetermined bending angle.

[0007] Furthermore, the angle compensation mechanism includes a push plate and a compensation drive unit; the push plate is horizontally slidably disposed in a slide rail opened on the pressure block; the compensation drive unit is connected to the push plate and is used to drive the push plate to slide laterally in the slide rail.

[0008] When the pressure block is pressed down to form a bend, the compensation drive unit drives the push plate to slide towards the bend and pushes the bend.

[0009] Furthermore, the force-applying end of the push plate is provided with a rolling component, and the push plate makes rolling contact with the bending part through the rolling component and pushes the bending part.

[0010] Furthermore, the rolling component is a roller arranged parallel to the push plate; the roller covers the area to be pushed in the bending part in the length direction.

[0011] Furthermore, the angle compensation mechanism also includes a sensor for detecting the lateral displacement when the push plate pushes the bending section to bend for the second time; the sensor is connected to the bending machine control system for signal transmission, and the bending machine control system controls the action of the compensation drive unit according to the preset displacement corresponding to the sheet metal springback amount;

[0012] When the roller is in its initial position, its outer circumferential surface is flush with the exit end face of the slide, so that the zero point of the measurement of the lateral displacement is consistent with the starting point of the push.

[0013] Furthermore, the sensor is a pressure sensor or a displacement sensor disposed between the push plate and the pressure block.

[0014] Furthermore, the upper positioning block and the pressure block are connected by a lifting sliding pair formed by a guide groove and a protrusion, the upper positioning block is elastically connected to the drive unit of the bending machine, and the pressure block is fixedly connected to the drive unit of the bending machine.

[0015] Furthermore, the lower support block is fixed to the worktable of the bending machine.

[0016] Beneficial effects: This utility model applies lateral thrust to the bent part immediately after sheet metal bending through an angle compensation mechanism, actively compensating for material springback, so that the final angle accurately reaches the design value, completely solving the problem of dimensional deviation caused by springback; it adopts a rolling contact push plate to avoid surface damage, and combines a closed-loop control system to detect displacement in real time and match the preset springback amount, significantly improving processing consistency and automation level, and improving sheet metal bending accuracy and quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the angle compensation mechanism and the pressure block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a sheet metal bending angle precision compensation device includes an upper positioning block 1 and a lower support block 2. The upper positioning block 1 is used to lower and press the sheet metal part 3 on the lower support block 2. A liftable pressure block 4 is provided on the side of the upper positioning block 1. The upper positioning block 1 and the pressure block 4 are connected by a lifting sliding pair formed by a guide groove and a protrusion. The upper positioning block 1 is elastically connected to the drive unit of the bending machine, and the pressure block 4 is fixedly connected to the drive unit of the bending machine. The lower support block 2 is fixed on the worktable 7 of the bending machine.

[0021] like Figure 1 and Figure 2 As shown, the pressure block 4 is equipped with at least one angle compensation mechanism 5; the position of the angle compensation mechanism 5 corresponds to the bent portion 30 formed after the sheet metal part 3 is pressed down by the pressure block 4; the angle compensation mechanism 5 is used to laterally push the bent portion 30 to perform a secondary bend after the bent portion 30 is formed by the pressure block 4, in order to compensate for the expected springback of the bent portion 30 and make it reach the predetermined bending angle. By actively compensating for the material springback through secondary bending, the bending angle is ensured to accurately reach the predetermined value, eliminating geometric deviations after unloading.

[0022] The angle compensation mechanism 5 includes a push plate 51 and a compensation drive unit 52. The push plate 51 is horizontally slidably disposed within a slide rail 41 opened on the pressure block 4. The compensation drive unit 52 is connected to the push plate 51 and is used to drive the push plate 51 to slide laterally within the slide rail 41. When the pressure block 4 is pressed down to form a bent portion 30, the compensation drive unit 52 drives the push plate 51 to slide towards the bent portion 30 and pushes the bent portion 30. It provides controllable mechanical thrust, ensuring precise execution of the secondary bending action. The structure is simple, reliable, and easy to integrate into existing bending devices.

[0023] The force-applying end of the push plate 51 is provided with a rolling component 53. The push plate 51 rolls and contacts the bending part 30 through the rolling component 53, pushing the bending part 30. This reduces scratches and frictional resistance on the sheet metal surface, avoids material surface damage during secondary bending, and ensures bending quality.

[0024] More specifically, the rolling component 53 is a roller arranged parallel to the push plate 51; the roller covers the area to be pushed of the bending portion 30 in the longitudinal direction. This ensures uniform force on the bending line, avoids local deformation or twisting, and improves the consistency of the bending angle.

[0025] The angle compensation mechanism 5 also includes a sensor 6 for detecting the lateral displacement of the bending section 30 during the secondary bending caused by the push plate 51. The sensor 6 is connected to the bending machine control system for signal transmission. The bending machine control system controls the movement of the compensation drive section 52 according to a preset displacement corresponding to the sheet metal springback, thereby achieving precise control and automatically compensating for the springback through displacement feedback to eliminate human error. When the roller is in its initial position, its outer circumferential surface is flush with the exit end face of the slide 41, so that the zero point of the lateral displacement measurement is consistent with the starting point of the push. The roller position design ensures the accuracy of the zero point of displacement measurement and improves control precision.

[0026] The compensation drive unit 52 is selected from electric push rods or cylinders.

[0027] The sensor 6 is a pressure sensor or displacement sensor disposed between the push plate 51 and the pressure block 4. Specifically, when a pressure sensor is used, a spring pressure sensor is used, and the spring compression is proportional to the displacement.

[0028] This invention utilizes an angle compensation mechanism to apply lateral thrust to the bent portion immediately after sheet metal bending, actively compensating for material springback and ensuring the final angle accurately reaches the design value, thus completely resolving dimensional deviations caused by springback. A rolling contact push plate prevents surface damage, and a closed-loop control system monitors displacement in real time and matches the preset springback amount, significantly improving processing consistency and automation. The elastic separation design of the upper positioning block and pressure block ensures the sheet metal remains stable and without displacement during secondary bending. The device has a compact structure and can be directly integrated into existing bending machines, greatly reducing rework rates and improving production efficiency and quality.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sheet metal bending angle precision compensation device, comprising an upper positioning block (1) and a lower support block (2), wherein the upper positioning block (1) is used to press down on the sheet metal part (3) on the lower support block (2), and the upper positioning block (1) is provided with a liftable pressure block (4) on its side. characterized in that At least one angle compensation mechanism (5) is provided on the pressure block (4); the position of the angle compensation mechanism (5) corresponds to the bent portion (30) formed after the sheet metal part (3) is pressed down by the pressure block (4); The angle compensation mechanism (5) is used to push the bent part (30) laterally for a second bend after the pressure block (4) forms the bent part (30), so as to compensate for the expected rebound of the bent part (30) and make it reach the predetermined bending angle.

2. The sheet metal bending angle accuracy compensation device according to claim 1, characterized in that: The angle compensation mechanism (5) includes a push plate (51) and a compensation drive unit (52); the push plate (51) is horizontally slidably disposed in a slide rail (41) opened on the pressure block (4); the compensation drive unit (52) is connected to the push plate (51) and is used to drive the push plate (51) to slide laterally in the slide rail (41); When the pressure block (4) is pressed down to form a bent part (30), the compensation drive part (52) drives the push plate (51) to slide towards the bent part (30) and push the bent part (30).

3. The sheet metal bending angle accuracy compensation device according to claim 2, characterized in that: The force-applying end of the push plate (51) is provided with a rolling component (53), and the push plate (51) rolls and contacts the bending part (30) through the rolling component (53) and pushes the bending part (30).

4. The sheet metal bending angle accuracy compensation device according to claim 3, characterized in that: The rolling component (53) is a roller arranged parallel to the push plate (51); the roller covers the area to be pushed of the bent portion (30) in the length direction.

5. The sheet metal bending angle accuracy compensation device according to claim 4, characterized in that: The angle compensation mechanism (5) also includes a sensor (6) for detecting the lateral displacement when the push plate (51) pushes the bending part (30) to bend for the second time; the sensor (6) is connected to the bending machine control system for signal transmission, and the bending machine control system controls the action of the compensation drive part (52) according to the preset displacement corresponding to the sheet metal springback amount. When the roller is in its initial position, its outer circumferential surface is flush with the exit end face of the slide (41), so that the zero point of the measurement of the lateral displacement is consistent with the starting point of the push.

6. The sheet metal bending angle accuracy compensation device according to claim 5, characterized in that: The sensor (6) is a pressure sensor or displacement sensor located between the push plate (51) and the pressure block (4).

7. A sheet metal bending angle precision compensation device according to any one of claims 1 to 6, characterized in that: The upper positioning block (1) and the pressure block (4) are connected by a lifting sliding pair formed by a guide groove and a protrusion. The upper positioning block (1) is elastically connected to the drive part of the bending machine, and the pressure block (4) is fixedly connected to the drive part of the bending machine.

8. A sheet metal bending angle precision compensation device according to any one of claims 1 to 6, characterized in that: The lower support block (2) is fixed on the worktable (7) of the bending machine.

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